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In situ Neutron Diffraction Study of Internal Micro‐Stresses Developed by Plastic Elongation in <110> Textured BCC Wires
Author(s) -
Gil Sevillano J.,
Alkorta J.,
González D.,
Van Petegem S.,
Stuhr U.,
Van Swygenhoven H.
Publication year - 2008
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200800209
Subject(s) - materials science , neutron diffraction , ultimate tensile strength , tungsten , elongation , brittleness , plasticity , composite material , residual stress , wire drawing , diffraction , anisotropy , metallurgy , optics , physics
By in situ neutron diffraction during tensile tests of a strongly <100> textured Nb wire, we have shown the development of internal tensile microstresses of the order of 20 % of the flow stress, acting normal to the longitudinally aligned {110} planes. Such stresses are retained as residual stresses upon unloading. They must be taken into account for preventing splitting failures of high strength BCC wires (e.g., highly drawn tungsten filaments or pearlitic steel wires) that, because of the drawing fabrication process, contain a high density of longitudinally oriented brittle interfaces.